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How to convert an enum type variable to a string?
...stead, but I think it's a bit cleaner to require an explicit "ToString" to convert the value to string form.
As a usage example, your OS_type enumeration would be defined as follows:
DEFINE_ENUM_WITH_STRING_CONVERSIONS(OS_type, (Linux)(Apple)(Windows))
While the macro looks at first like it is a...
AttributeError: 'module' object has no attribute 'urlopen'
...
A Python 2+3 compatible solution is:
import sys
if sys.version_info[0] == 3:
from urllib.request import urlopen
else:
# Not Python 3 - today, it is most likely to be Python 2
# But note that this might need an update when Python 4
# might be around one...
(-2147483648> 0) returns true in C++?
...whose integer conversion rank (4.13) is less than the rank of
int can be converted to a prvalue of type int if int can represent all
the values of the source type; otherwise, the source prvalue can be
converted to a prvalue of type unsigned int.
...
Find the nth occurrence of substring in a string
...on is going to be very inefficient for large strings when the match you're interested is near the beginning. It always looks at the whole string. It's clever but I wouldn't recommend this to someone who is new to Python and just wants to learn a good way to do it.
– Mark Byers
...
How can I truncate a double to only two decimal places in Java?
...
Formating as a string and converting back to double i think will give you the result you want.
The double value will not be round(), floor() or ceil().
A quick fix for it could be:
String sValue = (String) String.format("%.2f", oldValue);
Double ...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...ful.
// if it wasn't, the returned stream from operator>> would be converted to false
// and the loop wouldn't even be entered
// do stuff with correctly initialized data (hopefully)
}
And on your second question: Because
if(scanf("...",...)!=EOF)
is the same as
if(!(inStream >&...
How to create a custom-shaped bitmap marker with Android map API v2 [duplicate]
...e get the latitude , longitude and url form the web service , then how to convert the url into bitmap in it so fast
– Rishi Gautam
Apr 26 '13 at 10:13
...
Why is a round-trip conversion via a string not safe for a double?
...ng .NET 4.5.1 (x64), running the following console app which uses my DoubleConverter class.DoubleConverter.ToExactString shows the exact value represented by a double:
using System;
class Test
{
static void Main()
{
double d1 = 0.84551240822557006;
string s = d1.ToString("r...
How to get current time and date in C++?
...
std C libraries provide time().
This is seconds from the epoch and can be converted to date and H:M:S using standard C functions. Boost also has a time/date library that you can check.
time_t timev;
time(&timev);
sha...
How to round a number to n decimal places in Java
What I would like is a method to convert a double to a string which rounds using the half-up method - i.e. if the decimal to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
...